I remember playing this map a while ago, and everything worked properly at the end - you saw the 'spaceship' leaving, and all the monsters that spawned beneath it in the outdoor arena..

Now the map seems to be terminally broken - I can fix the teleports, but now the spaceship won't even materialise - since it's a brush entity, something is very badly wrong. Other basic map entities are failing in the same area so I think, sadly, it's RIP map.. Without the ending, there's not a lot of point in playing it anymore. :(